Printing-machine



(No Model.) 4 Sheets-Sheet 1. JF. MEISEL & H. L. OHAPIN. PRINTINGMACHINE.

Patented Aug; 17,1897.

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(No Model.) 4 Sheets-Sheet 2.

F. MEISEL & H. L. OHAPIN. PRINTING MACHINE.

No. 588,284. Patented Aug. 17, 1897 (No Model.) 4 Sheets-Sheet 4. 7

F. MEISE L & H. L. OHAPIN. PRINTING MACHINE.

No. 588,284. Patented'Aug. 17,1897

KUNHITEJD STATES.

' PATENT r cs.-

FRANCIS MEIsEL, OF BOsrON, AND HERBERT L. OHAPIN, OF CHELSEA,

MASSACHUSETTS, Assienons TO THE KIDDER rnnss MANUFAOTUa nve COMPANY, OFBOSTON,-MASSACHUSETTS.

'PRlNTING-MACHINE.

SPECIFICATION forming partof Letters Patent No. 588,284, dated. August17, 1897. Application filed 619, 1896. fierial No. 596,182. (No model.)

To all whom it may concern.-

Be it known that we, FRANCIS MEISEL, of Boston, and HERBERT L. OHAPIN,of Chelsea, in the county of Suffolk, State of Massachusetts, citizensof the United States, have invented certain new and useful Improvementsin Flat-Bed Cylinder Printing-Machines, of which the following is afull, clear, and exact description, reference being had to theaccompanying drawings, making part of this specification, in which-Figure 1 is a side elevation of a flat-bed cylinder printing-machineconstructed in aein the direction of the arrows.

cordance with our invention. Fig. 2 is aplan of the same. Fig. 3 is alongitudinal vertical section'onthe line 3 3 of Fig.2, looking Fig; 4 isan end view of the impression-cylinder, showing the mechanism foroperating the cylindergrippers, a portion of the end wall of thecylinder being broken away to show the parts behind the same. View ofthe impression-cylinder, showing the parts in a different position andthe printed. sheet beingdrawn off from the cylinder by thedelivery-grippers. Fig. 6 is a perspec tive view of thecylinder-grippers and mechanism for operating the same, the outline ofthe impression-cylinder being indicated by dotted lines. Fig. 7 is adetail of the impression-cylinder, showing the cylinder-grippers raisedfrom the gripper edge to receive a fresh sheet from the feed-board. Fig.8 is a sectional detail of the delivery-grippers and mechanism foropening "and closing the same. Fig. 9 is a plan of the parts shown inFig. 8. Fig. 10 is a detail of the clamp for holding thecylinder-packing? Our invention relates to flat-bed cylinderprinting-machines, and particularly to the cylinder-grippers anddelivery-grippers and the mechanism for operating the same; and ourinvention consists in the several novel featuresof constructionand'co'mbinations of parts hereinafter fully set forth, and definitelypointed out in the claims.

In the said drawings, A represents the framework of the machine, and Bthe reciprocating type-bed, to the under side of which is pivoted theconnecting-rod G, the opposite Fig. 5 is a similar end.

end of which is pivoted to the crank D on the crank-shaft b, whichcarries at its outer end the large gear E, which is driven by a pinion con the driving-shaft d. (Shown in Fig. 1.)

G is the impression-cylinder, which is provided at one end with a gearf, which meshes with a raek-bar g on the type-bed B, whereby thecylinder is rotated in the usual manner first in one direction and thenin the opposite direction as the said type-bed is reciprocated. Theshaft 77, of the cylinder G is supported in boxes a, placed withinvertical slots in the framework A, said boxes being connected in awell-known manner by rods 1' with eccentrics, (not shown,) by means ofwhich the cylinder is raised clear of the bed during the backwardmovement of the latter to throw off the impression, as is customary inprinting-machines of this description.

It, Figs. 5 and 7, is the cylinder-packing, which is held in place bymeans of alongitudinal clamp 12, pivoted at its lower edge within thecavity of the cylinderG and provided with an arm 15, having a set-screw16, Figs. 7 and 10, which bears against an adjacent portion of thecylinder and by means of which the upper end of the clamp is heldtightly against the turned-in edge of the packing 70, as shown in Figs.5 and 7, the upper edge of said clamp forming What is known as thegripper edge of the cylinder, with which cooperate the cylindergrippersm. These grippers are secured to a horizontal rock-shaft at, having itsbearings in a pair of boxes 25, Figs. 4, 5, and 6, adapted to slide inslots 26 in the opposite ends of the cylinder G near its periphery. Tothe gripper-shaft n are fastened two arms 28, the lower ends of whichare connected to two cranks or eccentrics 29, turned upon a rock-shaftH, having its bearings in the ends of the cylinder near its periphery.One end of the shaft H projects outside the cylinder and carries apinion 30, which meshes with a toothed sector 31 at mechanism to bepresently described, whereby the lever 32 is rocked against theresistance of a spring 3t, which encircles a rod 35, pivoted to the endof the lever 3 and passing through a guidc36, secured to the end ofthecylinder. This movement of the lever 32 in one direction by means of thelifting-lever L and in the opposite direction by the spring 3st causesthe shaft H to be oscillated to produce the desired movements of thegrippers, as will be hereinafter more fully explained. The lifting-leverL is fulcrumed on a stud 40, projecting from the framework A, and isconnected by means of a rod 42, lever 43, and short shaft it with alever -15, located on the outside of the framework and carrying acamroll 46, which works in a cam-groove 48 on the outside of the maingear E, said cam-groove having two inclines or depressions r 5, one toproduce a slight upward movement and the other a more extended upwardmovement of the lifting-lever L.

As the cylinder is revolved to bring the grippers 722 into position totake a fresh sheet the roll 14 of the lever 32 is brought into contactwith the curved upper face of the lever L, at which time the roll 46enters the portion 7' of the cam-groove 48 of the gear E, whereby thelever L is slightly raised, causing toothed sector-lever to turn thecrank-shaft H sufficiently to cause the grippers to be raised from thegripper edge to receive the sheet, as shown in Fig. '7, after which theliftinglever L returns to its former position, when the grippers will beinstantly closed by the spring 34, which brings them squarely down uponthe paper, after which the movement of the cylinder is reversed, whenthe sheet will be carried around into contact with the form and printedin the usual manner. Vhen the cylinder is in a position to take a freshsheet, the cranks or eccentrics 29, during the first part of theirmovement from the position shown in Fig. 6 and dotted in Fig. 7, aretraveling so nearly across the deadcenter that the grippers are onlylifted sufficiently to receive the sheet without having any appreciablebackward movement, but when the grippers are to be opened to release thesheet they are first raised slightly to clear the paper by the samemovement of the cranks 29 across the dead-center, as above described,the continuous movement of the crank-shaft H as the roll 46 passesthrough the portion 3 of the cam-groove 48 causing the gripper-shaft,with its boxes, to be drawn downward and thereby withdrawing the grippers in the direction of their length away from the gripper edge of thecylinder into the position shown in Fig. 5, the grippers after clearingthe gripper edge being carried down below the level of the same and outof the way of the edge of the printed sheet by the rocking of the shafta, which is produced by the movement of the cranks 29 as they approachthe dead-center in their descent, the deli very-grippers K,to bepresently d escribed,

being in this manner enabled to seize the edge of the printed sheet anddraw it off the cylinder without any liability whatever of its catchingin or being obstructed by the cylindergrippers, no auxiliary device ofany descrip tion being required to puslrup the edge of the printed sheetor place it in a position to be seized by the delivery-grippers, andconsequently the construction of the machine is materially simplifiedand its action rendered more reliable.

During the time that the cylinder-grippers are being withdrawn in thedirection of their length and lowered, as described, the printed sheethas been seized and is being drawn out by the delivery-grippers, asshown in Fig. 5, said delivery-grippers having seized the edge of theprinted sheet before the cylinder-grippers commenced to rise to releasethe sheet, and as the printed sheet is being drawn off by thedelivery-grippers the lifting-lever L returns to its former position,thereby permitting the grippers to be returned to their normal positionon the gripper edge by the action of the spring 3i.

During the time the sheet is being printed the grippers m are heldfirmly and securely in their forward position over and upon the gripperedge by the action of the spring 34, as shown in Figs. 4 and 6, and thegrippers are brought into contact with the paper and raised therefromwithout any sliding movement, thereby preventing the tearing or marringof the edge of the sheet, the grippers remaining in this position untilthe cylinder has completed its backward revolution into the position totake a fresh sheet, when the grippers will be opened to receive it, asbefore described. It will be seen that the cam-groove 48 and the spring34 produce all the required movements of the cylinder-gripper mechanism,the operation of the machine being thus simplified and the cost ofconstruction reduced to a minimum.-

The delivery-grippers K are mounted upon a shaft 50, supported inbearings in a carriage M, which extends transversely across the machineand is secured to rack-bars 52, fitted to slide in horizontal grooves orways in the sides of the framework A. These rackbars 52 are reciprocatedby pinions 53 upon a transverse shaft 54, carrying a small gear 55,which meshes with the gear f on the cylinder G, as shown in Fig. 3, themotion of which is thus transmitted to the carriage M to reciprocate thesame at the required times.

As the delivery-grippers K are brought up to the cylinder G they areopened to seize the printed sheet by means of a lever 61, secured to theend of the gripper-shaft 50, which arm is provided at its outer end witha small projection 56, which during the forward movement of the carriageM rides upon an inclined arm 57, pivoted upon a support projecting fromthe framework A, as shown in Figs. 8 and 9, thereby rocking thegripper-shaft 50 to open the grippers K, and just as the grip IIOper-carriage stops on its forward movement the projection 56 drops off ashoulder or offset 58 on the pivoted arm 57 thereby permitting thegripper-shaft to be turned by a spring 59, Fig. 8, which closes thedelivery-grippers K onto the end of the printed sheet. As thegripper-carriage M is drawn back the projection 56 passes under the arm57, as shown by dotted lines in Fig. 8, raising said arm on its pivotuntil said projection passes out from under it, when the arm will dropby-its own weight to its normal position upon a support 60 ready to actas before. At the termination of the backward movement of the carriage Mthe delivery-grippers are opened by a stop (not shown) in the usualmanner.

The upper edge of the cylinder-packing clamp 12, which forms the gripperedge or lower j aw of the cylinder-grippers, is provided along its upperedge with a series of rectangular notches or openings 0 (shown in Fig.10) for the reception of the lower jaws of the delivery-grippers K,which are thus permitted to get under the front edge of the printedsheet, as is necessary to insure the proper seizure of the same.

What we claim as our invention, and desire to secure by Letters Patent,is-

1. In a flat-bed cylinder printing-machine, the combination with theimpression-cylinder, of a shaft and grippers secured thereto, said shaftsliding in slots in the cylinder, whereby the grippers are made movablein the direction of their length away from and toward the gripper edge,a shaft provided with cranks or eccentrics connected with arms fast tothe gripper-shaft, and mechanismfor oscillating the crank-shaft, wherebythe gripper-shaft is moved away from and toward the gripper edge androcked to open and close the grippers and carry them below the level ofthe gripper edge as they are withdrawn therefrom, substantiallyas'described.

cylinder is rotated, and means for actuating the lifting-lever after thecrank-shaft-actuating mechanism has been brought into contact therewithby the rotation of the cylinder, substantially as set forth.

3. In a fiat-bed cylinder printing-machine, the combination with theimpression-cylinder, of a gripper-shaft and grippers secured thereto,said shaft being supported in boxes sliding in slots in the cylinder,whereby the grippers are made movable in the direction of their lengthaway from and toward the gripper edge, a shaft provided with cranks oreccentrics connected with arms fast to the gripper-shaft, and providedat its outer end with a pinion, a toothed sector-lever meshing with saidpinion and provided with a spring for actuating it in one direction, aliftinglever, fulcrumed on a stationary support, with which saidsector-lever is brought into contact as the cylinder is rotated, andcam-andlever connections for actuating the liftinglever when thesector-lever is in contact therewith, substantially as described.

Witness our hands this 15th day of J une,

' FRANCIS MEISEL.

HERBERT L. OHAPIN. In presence of- P. E. TESOHEMACHER, A. R. ELLINGWOOD.

